Looper-operating mechanism for sewing-machines.



L. ONDBRDONK. LOOPER OPERATING MEGHANISM FOR SEWING MACHINES. APPLIOATION FILED SEPT. 1o, 1907. l, l 29,590. Patented Feb. 23, 1915.

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witnesses L. ONDBRDONK. LooPER OPERATING MEGHANISM FOR SEWING MACHINES.

APPLICATION FILED SEPT. 10. 1907.

Patented Feb. 23, 1915.

3 SHEETS-fSHBET Z.

INVENTOR L. ONDERDONK. LOOPEB. OPERATING MEGHANISM FOR SEWING MACHINES. APPLIGATION HLBD SEPTJO, 1907.

1,129,590. Patented Fb. 23, 1915.

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' LANSING ONDERDONK, 0F NW YORK, N. Y., ASSIGNOR TO UNION SPECIAL MAHNE COMPANY, GF CHICAGO, ILLINOES, A CORPORATION 0F ILLNOlfS.

LOOPER-OEERATING MEGHANISM FR SEWIBQ'GMCHNES.

Specication of Letters latent." Patented Feb, 2?, Elgll.

' Application filed September 10, 19D?. Serial No. 392,208;

To all whom ymmy concern Be it known that L'LANSING CNDERDONK, a citizen of the United States, residing at New. York in the lcounty of New York, State of New Yaoi-k, have'invented certain new and 'useful improvements in Looper- Operating Mechanisms for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and iigures of reference marked thereon.` 'y

My invention relates to looper operating mechanisms for sewing machines, and` has forv its object to provide a looper-operating mechanism which is especially adapted'ffor use, in a 'sewing' machine having a vertical work supporting post, although it will be'.

obvious that from certain aspects, my iii- -vention is not restricted to a sewing niachine of this character. J

My invention consists in the parts, arrangements and vvimprmements hereinafter shown, described and set forth in the claims.

` rIn the drawings which show by Way of V illustration one embodiment of my, invention, Figure 1 is an end view, partly in section', and with parts removed, of a sewing machine embodying my improved loopei'- operating mechanism; Fig. 2 is a sectional view' of the work support, showing thc looper-operating mechanism in a different position; Fig. 3 is' a top view of the work support and `louper mechanism shov'vii in 2, with the throat plate .removed; Fig. l is :i top plan view of a work support,

showing the throat plate and feed dogs and I needle slots; Fig. is a detail sectional view 2 of the upper end of'a worksupport, showing thev looper carrier, its operatingflink, andV also the upper end of the feed bar; Fig. 6 is a, sectional view of' the upper'portionif the work support, showing the arm for.

moving the looper carrier 'laterallys and the bracket Afor.supporting said` arm; Fig. l'Lis a detail view of the' looper carrier vin side elevation; Fig. Sxis ajview similar" to Fig. T, with the louper thrown back into threading position; Fig. 9 is a detail in front elevationofthe looper rockingl lever; Fig. 10 is a view in sideelevation offthe same.; F ig. 11 is a. detail top plan view' of thelooper carrier; Fig. 12 is a front side viewof the saine; Fig. 13 is an end view ofthe same: Fig. 14 is a detail end view of the looper support; Fig. l5 is a top plan view of the y head 3 o' the usual construction.

saine; Fig. 16 isa diagrammatic view,sliowing the position of the needle and looper in front and in side view, when the looper is at the forward end of its stroke; and Fig.

17 is a similar view when the Ineedle point has passed below the looper thread.

The bed plate, 1 has rising therefrom:l a i standard 2, carrying an overhanging arm, which sii erts at its forward end a.v needle u The needle l is carried by a needle bar 5, which is reciprocated.inthe-needle head by a rotating disk 6, carried by the main shaft '7. through a link 8. 'The presser foot 9 is car-V 'f .ried by a presser bar 10, which is lifted by the usual hand lever 11.` .The needle thread... controller consists of an arm 12, mounted on the link S which vibrates the needle bar,

and said arm 12 carries thread' guides 13 and ifi, at the forwardend thereof. The

needle bar is provided with4 ai thread guide 15. `A thread controller 16 is mounted on a 'bracket 17, secured to the upper end of the needle head. The thread controller 16 carries aithread eye 18 at the yforward end, and is connected by a link 19 at the rear end vto a collar '20' mounted on a presser baril);

In the present ,embodiment of my invention, I have shown a plurality of needles, and cooperating with each needle is a looper. 21. For the .sake 'of clearness,y however, I will hereinafter refer to a single looper, it being imderstood, however. that 'either a single-looper or aplurality of ,loopers mayv be .used as desiredl- The looper 21, is mounted in a looper carrier 22, (see Figs. 11', 12 and i3). Said looper carrier 22'is provided with openings 23 to receive the shank of the louper, and said looperis held therein by a screw 24. The looper carrier is yoke shaped,l and each of its arms is pro` vvided with an opening, through which extends the 'looper-supporting rod 25,V (see' Fig. 5). i

'Rigidlyfsecured to the-looper supporting rod '25, and forming a part of theloop'er support is a member 26. Said member 2G is placed upon the 'looper-suppordting rod intermediate the arms of the'looper carrier. 105

The nier-uber 26 is providedwith an outwardly extending arm 27, which carries a ball studQS, to which is pivoted a link 29'.' As the link 29 is oscillated, the arin 27 throught-.he member 26, causes the loopen-11C1 vsupporting rod 23 to oscillate. The inemher 26 also provided with a fiat shoulder or projection .230. and with an outwardly extending arm 531.. 'l'he looper carrier 22- is provided with an outwardly extending arm 32, in which is piroted a latch 33 (see Figs. 2,17 vand 8). rl`he latch 33 consists of an outwardly extending operating arm 84, and

a locking lip 3.3. A spring 36 is secured at n 10 one end to the arni 34, and at itsother end to a d .wnwardly projecting stem 87, formed on the member 2G.

The looper carrier 22 is loosely mounted upon the .looper supporting rod 25, and

when in normal position the carrier is in contact with the shoulder or projection 30. Atythistime the latch 323 by means of the spring Gis swung so that the lip 35 engages thel outwardly extending arm 31, formed on the n'ieniber 26. lVhen, however, it is der sired to ytilt the looper b'ackward, so as to bring the saine back from underneath the work support in amore convenient place for threading, the arm 34 of the latch 33 is r` man ima ai@ np a5 tui-ned out of the path of the arin or projection 31, and the looper carrier then. turned backward, as shown in Fig. 8. I

The downwardly extendin' stud 37 of the loopcrsuliiport, carries a collhr 3,8, to which is piv'oted an arm 39 by apivot stud 40. v.'llng.opposite end of the arm 39 is formed wiihl ball support, which is secured in a similarly formed recess in the bracket 41. The bracket 41 is made in sections, as clearly shown in Figs. 5 and 6, and said sections are secured `together by suitable screws 42. As the looper'carrier and its support are oseilla'ted through the link 29, the arm 39 which 40 engages the stud 37 carried by said'looper ,su upprt,` will cause said looper support together with the' supporting rod 25 to move laterally. y i i j l The looper, as shown in the present embodiinent ,of my invention, is mounted in the upper eiid of a werk-supporting post 43,

which has lbearings formed therein to rer ceive the looper-supporting rod 25. On the upper endy of the work-supporting post 43 is seciirhda throat plate 44. `The throat plate 4.91 is provided with suitable needle openings ,4.5. and vwith feed slots. The feed 'do'gsl 46, lwhich work' inthe feed slots are carried ldy a feed dog supporting plate 47,

which is' mounted upon the upper end of the feed 'bar 4S. Said feed bar 48, at its upper end is provided with outwardly curved arms 49, which forni an opening in which the looper 'may vibrate-back andl forth, and

59 which alsa permits [of the loopercarrier being'swu ig backward when released, for "the purposeI 'pf threading. Said work-,sup-

` 'porting post as clearly shown in Figs. 1

'fand-'3, is piovided with an opening atthe 55 rear thereoff which opening is adjacent the throat plate or work support threaded looper when 'disconnected from its support may be swung rearwardly into this opening, so as to facilitate the threading thereof,l as above noted.

The looper is oseillated through the link which is pivoted at its lower end to a rock lever 5,0. Said rock lever 50 is pivoted at 51 to the work supporting post 43, vand has one of its arms 52 pivotally connected at 53'to the link 29. The other arm 54 of the rock lever 50 is pivoted at 55 to a linkl 56, which in turn is pivoted at 57 to a crank varm 5S, secured to the outer end of the shaft Y 59. The shaft 59 is mounted in suitable bearings in the bed plate of the machine,

and is rotated by any suitable means, pref-- erably from the main shaft 7 in the overhanging arm. The disposition of the rock shaft 5l and the pivotal connections of the links 29 and 56, are such that the looper is The moved forward very quickly into thev needle loop, and is given an extended dwelletthe for ard end of*y itsv stroke. The arm 39 moves from ,a position substantially at right angles to the line of feed and at a distancev in front of the needle path, as shown in dotted lines in Fig. 6, to a position at' an angle to the line of feed and with its outer end inv rear of the needle path, The resulting movement of the looper point is from a position in rear of the needle forward into the needle loop and at the same time laterally of the line of feed so that when said looper is in its forward position, the eye thereof, is on the other side of the line of feed, and the body of the looper has practically crossed the needle path. This position of thelooper at the forward 'end of its stroke, holds the looper thread running from the eye of said looper to the previous stitch, well to the right of the needle path, as shown in Fig. 1G. The looper at this time, is given an extended dwell so that the needle descends and the point thereof passes into the needle slot in the work support before the looper begins to retract. A looper on its reti-acting stroke` are slow and therefore, the needle point will pass the por-- tion of the looper thread above referred to,

The first movements of the' before the looper has removedvbackward,

but a slight distance. It is only necessary7 that the loopcr shall move back sulliciently for the needle to pass the looper on the left side thereof, as seen in Figs. 16 and 17 and between the body'V of the looper and the itc looper thread between the eye of said looper and -the'previous stitch. Owing to the fact that'the-arm -39 moves from a position substantially at right angles to the line of feed when the looper is retracted to a position at an acute angle thereto. the lateral movements-of the looper will be first very slow and wif increasing speed until the looper reaches' its forward position. This allows engaged hy I ,risen sueiently tofallorv the'l looper to cross 'nemesio the looperv tev move forward withilittle or no lateral movement' until the:v needle loop is the -looper'and Ithe needle has its path'. 'ln order that the looperv ina-y lcarry its loopen thread to the opposite side y of the path of the l needle and then retract,

so that the needle Wiil passA between' the looper thread and the body lo f'tle loopei', it is very evident that the looper must move hack and forth insubstantially the'same of said looper thread and the looper will at the same 'time hefi'etracted sui'ciently to allow 'the needle to pass on the proper side of the looper.- rl`hi`s movement or the looper whereby the looper thread is held well to one,side 'for the needlepath, may be called a loop spreading movement of the looper for thearea'son that the Aneedle is vcaused with certainty to enter the looper thread loop. The movement of the looper across the path of the needle to spread the looper thread loo for vthe entrance of the needle is not claimed broadly herein, as the same forms the subiect in atter of my application, Serial Number' 3315590, filed October 8, 1906.'

'lt-` is `oivions that. the looper may be moved so'asto' cross the needle path from' the other sideii desired. The only change inv `structure necessary to Aaccomplish this movement oi the looper, would he thel curving of thelooperi-n the opposite direction, and mounting. the, bracket which carries 'the sainepath andde'vicesoperated bythe oscillation of the loopery for moving said loo-per.y

arm 39 onthe opposite' side of the Work -supporting'post.

Having thus" particularly described my invention, what l claim as iieiv and desire to secure by Letters Patent-,'is:

i. A. sewing bination, a vertical Work-supporting post, a needle,I a threaded looper mounted in said Worlc'support and swinging about an airis4 at right anglesv to the line of feed, a rotary shaft, and means 'intermedia-te said rotary shat-andisaid looper orloscillatingthe louper bach and forthin substantially the laterally to position the looper thread on the opposite side of the needle from the path of movement of the looper.

'machine' including in com# 2. A sewing machine including in combination, a vertical Work-supportingpost, a

needle, a threaded looper mounted in said work-supporting post and moving about an axis at right angles to the line of e'ed, a rotary sha-ft, means intermediate said.ro. tary shaft and said looper for oscillating said looper back and forth in substantially the same path and .for moving the looper laterally and giving thereto an extended dwell at the forward end of its stroke, whereby the looper thread is positioned upon, the opposite side ofthe needle -from the path of movement of the looper.

'3, A sewingmacliine including in combineedle, a threaded looper, a 'loopen carrier mounted to oscillate` about an axis at right angles to the line; of feed, a rotary shaft, a`

link operated by said rotary shaft and connected to said carrier, and means coperating Awith the carrier for moving the saine laterally as' it is` oscillated, whereby said looperis mZm-dleack and forth in substantially the saine-path and is moved laterally i 80 nation," a vertical work-supporting post, a

for positioning the looper thread on the opposite side of the needle from the path oi' movement of the looper.

afloop'er, a carrier therefor, a rotary shaft, a link connected to said rotary shaft, for oscillating said looper, and an arm pivoted tij/said loopei and to the work supporting post, for. movin-'g the saine laterally.

5. A sewingmachine including in combination a vertical work supporting post, a

wl. A sewing machine including in com` hination a vertical Work supporting post,

looper, a carrier therefor, aA ,rotary shaft, a

linlr connectedto said rotary shaft for oscillating said looper and an arm pivoted'to said looper carrier and ,"to the Work supporting post. for moving the saine laterally,

.and means for adjusting 4the pivotal connection of said arm to said work supporting post. v

(l. A sewing machine including in combinatioinavertical worl: supporting post, a

looper carrier mounted in said Work supporting post, a looper carried thereby, a

rotary shaft, a rock lever, means for connecting said rotary shaft to said rock lever,

means ior connecting said rock lever to said louper carrier, said rock lever being s0 disposed that said looper is given an. extended dwell at the forward end of its stroke.

T. A sewing machine including in combination a vertical Work supporting post, a looper carrier mounted in said Work supporting p0st,'a louper carried therby, a rotary shaft, a rock lover, means for oonnccting said rotary shaft to said rock lever,

"means for connecting said rock lever t`o said looper carrier 'for oscillating said 'looper and means operated through said rock lever for moving said looper laterally, said rock lever iso being. so disposed that said looper is given an extended dwell at the forward end of its stroke. y

8. A sewing machine including in come bination a vertical work supporting post, .alooper carrier mounted in said work supporting post, a looper carried thereby, a

' rotary shaft, a rock lever, means for conis oscillated the saine may be moved lat-Y necting said rotary shaft to said rock lever, means .for cnnecting said rock lever to said looper carrier, for oscillating said looper and an'arm pivotedto said work support and to said looper carrier for moving the same laterally.

9. A sewing machine including in conibg nation a work support, a looper carrier, a looper mountedin said carrier, a'rotary shaft, arock lever,a connection including a link between said rotary shaft 'and said rock lever, a connection including a lin-k between said rock lever and said looper carrier, an element pivoted to said looper carrier and to said work support whereby when said looper erally, and .means for adjusting the conneci tion between said element and the work support.

. 10. A sewing machine including in combination a vertical work support, a looper'.

carrier, a looper support on which said looper carrier is mounted, a rotary shaft, a rock lever, a link connecting ysaid rotary shaft to said rock lever, a link connecting said rock lever to said Llooper carrier, 'an arm pivoted at oneend to said-looper supvport and having a ball stud on its opposite end, a bracket mountedV on said work supporl and having a socket to receive -saidball stu I carrier, a looper support on which,-said looper carrier is mounted, a rotary shaft, a rock lever, a link connecting vsaid rotary shaft to said rock lever, :a link connectingv said looper support, whereby the loopercarL chines includingvin ,combination a 'looper rier may be released and the looper turned ba ward into convenient position for th eadi'ngz '13. A loopermechaiiism' for sewing inafor threading.

11. A sewing machine including in coml blnation a vertical work support, a looper' carrier, a looper mounted therein, a looperV support-swinging about the same axis as the 65 vlooper carrier, a latch for'connecting ,said looper carrier to said looper support, where' by said looper may be oscillated backward upon said support and rendered accessible 14. A looper mechanism for sewing machines including'in combination a looper.-` carrier, a looper supported therein a looper support, a lug mounted on said looper-support, a-latch carried by said looper carrier 7,5

and a spring for holding said latch in en gagement with said lug, whereby said looper is held properly positioned upon said looper support. 1

15. A lcioper mechanism for sewing mavchilies including 'in combination a looper carrier, a looper `mounted therein, said vlooper carrier having' outwardly extending arms, a looper. support extending freelyI through said -arms,.'a lug carried by^said 8.5v

looper support, and a latch carried by said l looper carrier and engaging said lug whereby said looper carrier may be swung about said looper support and rendered accessible for threading. v v

16. A sewing machine including in combination a vertical work supporting pbst," having a needle plate at its upper end, a looper supportlocated beneath the needle plate, a looper carrier mounted on said support and adapted to oscillate about the axis of the loopersupport, means `for oscillatv ing the 4looper support, a looper mounted in the looper carrier,l and means for detachably securing Athe looper carrier to the looper 10G support whereby said carrier may be moved on the looper supportfindenendently of the,

oscillation of the support so {that-the looper may be turned back from beneath the needle i plate for convenience in threading.

17. A- sewing machine including in combination, a tubular casing? having a worksuppoiting'portion, a needle, afihread carrying looper beneath said work-supporting portion coperating withy said needle, a 11o looper support, rmeans for v,riioving said looper support, said casing havinglan opening in the side`thereof adjacent-said worksupporting portion, and means-for vconnect- '.ing said looper` to said looper support, 115 whereby the same may be swung in deprend--.v

ent of the movement of the support, relative to-said support to a position in said opening i to facilitate the threading thereof.

In testimony whereof 'I affix my signa- 126 ture, in presence'of two witnesses.

1Witnesses: '1

WALTER HARTLEY, FRANKLIN H. CHILTON.

LANSING oNDERnoNK; 

